Tire or other valve.



H. P. KRAFT & M. C. SCHWEINERT.

' TIRE OR OTHER VALVE. APPLICATION men SEPT. 5, 1905.

Patented June 13, 1916.

FIG.

INVENTOR y HENRY P. KRAFT, OF NEW the valve YORK, N. Y., AND MAXIMILIAN CHARLES SCHWEINERT, OF

WEST HOBOKE'N, NEW JERSEY, ASSIGNORS TO A. SCHRADERS SON, INCORPORATED,

OF NEW YORK, N. Y., A CORPO ATION OF NEW YORK.

TIRE OR OTHER VALVE.

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To all whom it may concern Be it known that we, HENRY P. KRAFT, residing in the borough of Brooklyn, county of Kings, city and State of New York, and MAXIMILIAN CHARLns SGHWEINERT, residing in West Hoboken, in the county of Hudson and State of New Jersey, both citizens-of the United States, have jointly invented certain new and useful Improvements in Tire or other Valves, of which the following is a specification. I

This invention relates to pneumatic valves for tires, and aims to provide an improved construction which will prevent the distortion of the closing spring such as sometimes occurs with valves now in use; which construction is at the same time extremely cheap and is itself of ample strength.

Other improvements are referred to in detail hereinafter.

The accompanying drawings. illustrate embodiments of the invention.

Figure 1 is a longitudinal section with the valve closed. Fig.2 is a longitudinal section with the internal parts in elevation, showing the valve open. Fig. 3 is a view similar ,to Fig. 1 illustrating another means of obtaining the desired result. Fig. 4 is a similar section of another embodiment.

Referring to the embodiments illustrated, the valve comprises a shell A, a seat mem-- ber B, a plug C carrying the seat member and screwing into a socket at the upper end of the shell a valve stem D projecting above and below the valve proper E, a closing spring F, a spring holder G, a packing ring H making an air tight joint between the seat member B and the shell A. In general these parts may be of any usual or suitable construction and operation, the internal parts shown being adapted to-be inserted in or removed from the shell at will by screws ing in or out the plug C, which, for this purpose, is provided with a screw-driver rib on its top adapted to be engaged by a complementary provision on the cap; these parts being, generally speaking, all old and well understood in the art.

When the valve is to be deflated the outer end of the stem D is pressed downward to withdraw the valve proper E from its seat. Similarly when air is pumped into the tire E is forced off from its seat. In

both these operations the springF is com- Specification of Letters Patent.

' Application filed. September 5, 1905.

Patented June 13, 1916.

Serial No. 277,053.

pressed, and often with considerable force, which produces a permanent distortion of the fine brass wire spring F affects the operation of the valve.

According to this invention a simple,

cheap and strong stop is provided comprising preferably a member arranged between and injuriously a fixed abutment and an abutment movable with the valve, and serving to limit the movement of the valve so that the spring F can only be compressed for a slight distance sufficient to admit the full quantity of air past the valve. For example, the stop may consist of a small tube J of sheet brass or other metal surrounding the stem D. As illustrated in Figs. 1 and 2 the stop J may be arranged between the lower face K of thevalve proper and the top L of the spring holder G. The member J may be fixed to the spring holder G or to the under side of the valve proper (or, equivalently, to the valve stem at a suitable height), but it can be more cheaply made as a loose tube through which the stem passes. When the valve is opened it cannot move farther than the position shown in Fig. 2, in which the lower end K of the valve rests upon the stop J, and the lower end of the stop rests in turn upon the top L of the spring holder G. In this position the spring is not com pressed to its limit, and thereby the distortion which has previously caused difficulties is avoided. At the same time the dangerof straining and bending the valve stem (which is necessarily of rather small diameter) is avoided by the reinforcing effect of the surrounding tubular stop J On the other hand the tubular stop J may be arranged between the upper end M of the seat member B and a shoulder N formed by flattening the upper end of the stem D, as shown in Fig. 4 or formed in, any other suitable way on the stem. Here also it'is to be observed that the stopJ may be fixed upon the upper end of the seat member or upon the shoulder N or other fixed part of the ,valve stem, being altered to suit the circumstances. Supposing it to be loose, as in the manner of Figs. 1 and 2, it is clear that upon pressing down the stemD its movement is limited to the space between the abutment N and the upper edge of the tubular stop. This movement will be made less than the movement soft material and" ofthe length of the member I roe necessary to completely compress the spring. Therefore the desired efi ect,'the saving of a sudden strain or blow upon the spring in its point of utmost compression, will .be avoided.

Instead of forming the tubular sleeve J of sheet-metal, it may be formed of a closely Wound spiral J of fine Wire, as illustrated in Fig. 3, so as to avoid the possible weakness introduced by the vertical joint in the sheet-metal tube indicated in Fig. 2.

Though We have described with great par-. ticularity of detail certain specific embodiments of our invention, yet it is not to be understood therefrom that the invention is limited to the specific embodiments disclosed. Various modifications thereof in detail and in the arrangement and combination of the parts may be made by those skilled in the art Without departure from the invention.

What we claim is 1. A valve for tires or the like, including a valve proper E, a closing spring F, a spring holder G, a seat member B, a valve stem D carrying said holder, spring, valve proper and seat member, and a stop for limiting the movement of said valve proper away from its seat to an the play of the spring.

2. A valve for tires or the llke, including a valve proper E, a closing spring F, a spring holder G, a seat member B,a valve stem D carrying saidholder, spring, valve proper and seat member, and a tube J surrounding the valve stem loosely and lying between said holder and an abutment on the valve stem, said tube J serving as a stop amount less than to limit the movement of the valve.

including 3. A valve-for tires or the like, a valve proper E, a closing spring F, a spring holder G, a seat member B, a valve stem D carrying said holder, spring, valve proper and seat member, and a tube J surrounding the lower portion of the stem D therefor, a seat member,

signed our names in the scriblng witnesses.

loosely and arranged between the spring holder G and the lower end K of the valve proper and serving as a stop to limit the movement of the valve.

4. A valve for tires or the like, including a valve proper, a closing spring therefor, a seat member, a valve stem passing through said closing spring and seat member, and a stop carried upon said valve stem for limiting the movement of said valve proper away from its seat to an amount less than the play of the spring.

5. A valve for tires or the like including a closing spring and a stop located below said seat member for'limiting the movement of said valve proper'away from its seat, said valve proper, closing spring and stop being connectedso that they can be removed together from said shell.

6. A valve for tires or the like,-including a shell, a valve proper, a closing spring therefor, a detachable seat member within said valve shell, valve stem passing through said closing spring and seat member'and a stop carried upon said valve stem and detached from said shell for limiting the movement of said valve proper away from its seat to an amount less than the play of thespring.

7. Internal parts of a valve mechanism comprising a valve-proper, a closing-spring therefor, and a stop beneath said valveproper for limiting the movement of said valve-proper away from its seat, said parts being connected together and adapted to be handled in connected relation.

In witness whereof, we have hereunto presence of two suba shell, a valve proper,

HENRY P. KRAFT. MAXIMILIAN CHARLES SCHWEINERT. Witnesses:

DOMINGO A. UsINA, FRED WHITE. 

